<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      var arr = [{label:'男',value: 1}, {label:'女',value: 0}]
 
      function f(arr) {
        // 写代码，得到
        const a = arr.map(item => {
          return item.label
        })
        return a
      }
      var arr2 = f(arr);
      console.log(arr2)
      // arr2 = ['男', '女']
    </script>
  </body>
</html>
